diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/lguest/boot.c | 17 | ||||
| -rw-r--r-- | arch/x86/lguest/i386_head.S | 17 |
2 files changed, 5 insertions, 29 deletions
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c index 495e46a..d2235db 100644 --- a/arch/x86/lguest/boot.c +++ b/arch/x86/lguest/boot.c @@ -928,18 +928,8 @@ static unsigned lguest_patch(u8 type, u16 clobber, void *ibuf, /*G:030 Once we get to lguest_init(), we know we're a Guest. The pv_ops * structures in the kernel provide points for (almost) every routine we have * to override to avoid privileged instructions. */ -__init void lguest_init(void *boot) +__init void lguest_init(void) { - /* Copy boot parameters first: the Launcher put the physical location - * in %esi, and head.S converted that to a virtual address and handed - * it to us. We use "__memcpy" because "memcpy" sometimes tries to do - * tricky things to go faster, and we're not ready for that. */ - __memcpy(&boot_params, boot, PARAM_SIZE); - /* The boot parameters also tell us where the command-line is: save - * that, too. */ - __memcpy(boot_command_line, __va(boot_params.hdr.cmd_line_ptr), - COMMAND_LINE_SIZE); - /* We're under lguest, paravirt is enabled, and we're running at * privilege level 1, not 0 as normal. */ pv_info.name = "lguest"; @@ -1024,11 +1014,6 @@ __init void lguest_init(void *boot) * the normal data segment to get through booting. */ asm volatile ("mov %0, %%fs" : : "r" (__KERNEL_DS) : "memory"); - /* Clear the part of the kernel data which is expected to be zero. - * Normally it will be anyway, but if we're loading from a bzImage with - * CONFIG_RELOCATALE=y, the relocations will be sitting here. */ - memset(__bss_start, 0, __bss_stop - __bss_start); - /* The Host uses the top of the Guest's virtual address space for the * Host<->Guest Switcher, and it tells us how much it needs in * lguest_data.reserve_mem, set up on the LGUEST_INIT hypercall. */ diff --git a/arch/x86/lguest/i386_head.S b/arch/x86/lguest/i386_head.S index ba4282e..ebc6ac7 100644 --- a/arch/x86/lguest/i386_head.S +++ b/arch/x86/lguest/i386_head.S @@ -5,11 +5,8 @@ #include <asm/thread_info.h> #include <asm/processor-flags.h> -/*G:020 This is where we begin: we have a magic signature which the launcher - * looks for. The plan is that the Linux boot protocol will be extended with a - * "platform type" field which will guide us here from the normal entry point, - * but for the moment this suffices. The normal boot code uses %esi for the - * boot header, so we do too. +/*G:020 This is where we begin: head.S notes that the boot header's platform + * type field is "1" (lguest), so calls us here. The boot header is in %esi. * * WARNING: be very careful here! We're running at addresses equal to physical * addesses (around 0), not above PAGE_OFFSET as most code expectes @@ -19,19 +16,14 @@ * The .section line puts this code in .init.text so it will be discarded after * boot. */ .section .init.text, "ax", @progbits -.ascii "GenuineLguest" +ENTRY(lguest_entry) /* Make initial hypercall now, so we can set up the pagetables. */ movl $LHCALL_LGUEST_INIT, %eax movl $lguest_data - __PAGE_OFFSET, %edx int $LGUEST_TRAP_ENTRY - /* Set up boot information pointer to hand to lguest_init(): it wants - * a virtual address. */ - movl %esi, %eax - addl $__PAGE_OFFSET, %eax - /* The Host put the toplevel pagetable in lguest_data.pgdir. The movsl - * instruction uses %esi, so we needed to save it above. */ + * instruction uses %esi implicitly. */ movl lguest_data - __PAGE_OFFSET + LGUEST_DATA_pgdir, %esi /* Copy first 32 entries of page directory to __PAGE_OFFSET entries. @@ -47,7 +39,6 @@ /* Set up the initial stack so we can run C code. */ movl $(init_thread_union+THREAD_SIZE),%esp - /* Jumps are relative, and we're running __PAGE_OFFSET too low at the * moment. */ jmp lguest_init+__PAGE_OFFSET |
